Since I'm a candyassed rider its still to crappy to get much riding in, I pulled the base off an operating ignition switch to clean the contacts. On the housing its marked PL336. That's probly a Zadi part number but I don't know if you could find one by that. There are two screws holding it to the switch that accessible from the bottom without fooling with the lock portion of the switch. tricky parts are getting the tabs to release, there is a cover that comes off first , then the base where the contacts are. the next is clocking the contact plate so its easier to pay attention when you disassemble it rather than figuring that out which is the way I did it. I broke my camera so no pics